RE: CD Waiver Sign-off... The Best Propeller Plane for the Test?
I believe using a prop is OK if the following is achieved:
1. The plane has both retracts AND flaps and
2. The plane is capable of doing 100 MPH or more
These were the 2 requirements I was told when I was seeking to get my turbine waiver and was building a Great Planes Patriot to fullfill those. Eventually I just got a Tam F-16 and was waivered on that. I am not a CD but to answer your question, personally, I would turn them down.